RAE-SAN V1.02 OBD-Bridge, Installation Manual

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The VF750 Magna ( and some others most likely) uses a scheme where the measurement is only pulsed every few
seconds – and then it returns to a 12V reading – in this case it is necessary to capture the low point of the pulse and
save this as the value – so in this case the PK_LOW_6S is the option of choice.
If using the bias from the OBD-Bridge then a 1s Average value is fine as there is not pulsing to deal with.
level EMPTY 1/3 2/3 Full
Resistance 97 68 37 8
Comment Empty meter
reading
1/3 full 2/3 fiull FULL
Voltage when
biased by
OBD_Bridge
3.2V 2.25v 1.22 0.26v
Voltage counts
biased by
OBD_Bridge
512 360 195 41
Voltage biased
by Meter
Counts Biased by
meter
Fuel – Injection
If set for the fuel injection measurement mode – the system measures the fuel flow from the total injector opening
time. This is largely a cilbrate and forget system apart from needing to be reset when the tank is refilled – as it needs
to then count the usage from a full tank.
The single button input for the Low Fuel alarm is used to control the fuel calibration.
•
Holding the button >2.5s and <10s, in normal mode – resets to a full tank but does not recalibrate.
•
Holding the button in > 10 seconds – enters Calibration mode
o
In calibration mode the fuel amount is shown on the tacho display at 100 RPM / litre – so 1650r rpm
=> 16.5 litres
•
In calibration mode – a short press
( <2.5s
) increments the amount by 0.1 litre
•
In calibration mode – a long press (> 2.5s , < 10s ) increments by 1.0 litre
•
When max (25 litre is reached a short press will reset to minimum)
•
Holding the Button in > 10 secs will then exit calibration mode, calculating the calibration and storing the
values.
So the simplest Calibration procedure is
•
Fill the tank to full
•
Press button for >2.5 < 10s to reset to zero the counters.
•
Ride the bike normally until you hit reserve or say 200km
•
Fill the tank and note the amount of fuel put in the tank.